Fitting device for christmas tree bases

ABSTRACT

The invention belongs to the technical field of household appliances, and particularly relates to a fitting device for Christmas tree bases. The fitting device includes frames and connecting members, outer ends of the respective frames are approximately on the same cylindrical surface, the connecting member is arranged between outer ends of two adjacent frames, at least one connecting member is arc-shaped and its curvature is greater than that of a corresponding arc, and the connecting member is elastic in a radial direction, so that a tree base of a conventional real tree can also be used to fix an artificial tree or a small-size real tree.

FIELD OF THE INVENTION

The invention belongs to the technical field of household appliances,and particularly relates to a fitting device for Christmas tree bases,which is used to fixing Christmas trees for Christmas decoration.

BACKGROUND OF THE INVENTION

Christmas trees are indispensable when people dress up for Christmas.Currently, there are mainly two types of Christmas trees, including realtrees as Christmas trees, and artificial Christmas trees. However, thesize of trunks at the bottom of the two Christmas trees is obviouslydifferent. Generally speaking, the height of a real tree is about 1-4 mand the diameter of a trunk at the bottom is about 6-20 cm; whileartificial trees are not restricted by the growth of normal real treesand the materials used can also be lighter, so the diameter of trunks atthe bottom is generally only 1-5 cm. Therefore, artificial trees aregenerally fixed with relatively thin and small tree bases.

In addition, in order that a traditional tree base is fitted to fix atrunk at the bottom of a real tree within a certain range, multiplescrews that can be steplessly adjusted are generally used to act on thetrunk to achieve a lateral limiting effect. However, it is obviously notapplicable to artificial Christmas trees with a diameter of only 1-5 cm.In practical applications, traditional tree bases generally cannot beadjusted to fit such a small size. Even if a small number of tree basescan be adjusted to fit this size, the fixing effect is very weak and theartificial Christmas trees are prone to fall over.

CN206025978U discloses a tree base, which is a conventional tree basemainly applied to real trees, wherein a trunk at the bottom of aChristmas tree is laterally fixed by adjusting a clamping device 3, andthis Christmas tree base is weakly fixed and easy to fall over whenapplied to artificial trees. CN209186307U discloses another Christmastree base, which achieves the mounting and matching of stumps ofdifferent sizes by adjusting stump limiting blocks 3 with different arcedges, but this tree base can fit a limited number of sizes and also hasa weak effect on artificial trees. Therefore, it is necessary to developa fitting device that can fit a base of a real tree, and fix a Christmastree with a smaller bottom trunk size, such as an artificial Christmastree or a small-sized real tree.

SUMMARY OF THE INVENTION

An object of the invention is to provide a fitting device that can beapplied to traditional Christmas tree bases so that an artificialChristmas tree with a smaller bottom trunk size can be fixed with a baseof a real tree. The fitting device has the advantages of lowrequirements for machining accuracy, high matching degree, good fixingeffect and convenient access.

As a first aspect of the invention, a fitting device for Christmas treebases is provided to be fitted into a cavity of a Christmas tree base sothat an artificial Christmas tree can be fixed with a base of a realtree. The fitting device includes a side fitting member and a bottomfitting member that are connected to each other, wherein an upper end ofthe side fitting member is formed as an upper end surface of the fittingdevice, a lower end surface of the bottom fitting member is formed as abottom wall of the fitting device, and the upper end surface is providedwith a tree base hole for fitting a small-sized tree base of anartificial Christmas tree. The side fitting member includes frames andconnecting members, there are several frames which are arranged toextend outward in a radial direction from an outer surface of the treebase hole to form a frame group with a radial shape; the length of therespective frames is approximately equal, so that outer ends of therespective frames are approximately on the same cylindrical surface; theconnecting member is arranged between outer ends of any two adjacentframes, and is elastic in a radial direction so as to be fitted on aside wall of an inner cavity of the tree base through the deformation ofthe connecting member in the radial direction; at least one connectingmember is arc-shaped and its curvature is greater than that of acorresponding arc; and the respective connecting members are formed asthe side wall.

The corresponding arc refers to a virtual arc segment of the outer endsof the any two adjacent frames on the cylindrical surface.

As a second aspect of the invention, a fitting device for Christmas treebases is provided to be fitted into a cavity of a Christmas tree base sothat an artificial Christmas tree can be fixed with a base of a realtree. The fitting device includes a side fitting member and a bottomfitting member that are connected to each other, wherein an upper end ofthe side fitting member is formed as an upper end surface of the fittingdevice, a lower end surface of the bottom fitting member is formed as abottom wall of the fitting device, and the upper end surface is providedwith a tree base hole for fitting a small-sized tree base of anartificial Christmas tree. The side fitting member includes frames andconnecting members, the frames are arranged in a crisscross pattern toform a mesh structure, and the length of the frames is set according tothe position of the respective frames so that outer ends of therespective frames are substantially on the same cylindrical surface. Theconnecting member is arc-shaped and arranged between outer ends of anytwo adjacent frames to connect the outer ends of the two frames; atleast one connecting member is arc-shaped and its curvature is greaterthan that of the cylindrical surface, and the respective connectingmembers have the same or different curvature; and the connecting memberis elastic in a radial direction so as to be fitted on a side wall of aninner cavity of the tree base through the deformation of the connectingmember in the radial direction. The connecting member and the frameadjacent thereto are formed as a side acting member, and the respectiveside acting members are continuously arranged to form a continuous sidewall; or the connecting member and the frame adjacent thereto are formedas a side acting member, a notch is formed between two frames without aconnecting member, and the side acting members and the notches arearranged spacedly to form a side wall formed by spacedly arrangedconnecting members.

The corresponding arc refers to a virtual arc segment of the outer endsof the any two adjacent frames on the cylindrical surface.

As a third aspect of the invention, a fitting device for Christmas treebases is provided to be fitted into a cavity of a Christmas tree base sothat an artificial Christmas tree can be fixed with a base of a realtree. The fitting device includes a side fitting member and a bottomfitting member that are connected to each other, wherein an upper end ofthe side fitting member is formed as an upper end surface of the fittingdevice, a lower end surface of the bottom fitting member is formed as abottom wall of the fitting device, and the upper end surface is providedwith a tree base hole for fitting a small-sized tree base of anartificial Christmas tree. The side fitting member includes frames andconnecting members, the frames include inner frames and outer frames,the inner frames are arranged in a crisscross pattern to form a meshstructure, a connecting frame is connected to an outer end of at leastone inner frame, and the outer frames are arranged to extend outward ina radial direction from an outer surface of the connecting frame to forma frame group with a radial shape; and the length of the respectiveouter frames is approximately equal, so that outer ends of therespective outer frames are substantially on the same cylindricalsurface. The connecting member is arc-shaped and arranged between outerends of any two adjacent outer frames to connect the outer ends of thetwo outer frames; the respective connecting members are arc-shaped andtheir curvature is greater than that of the cylindrical surface, and therespective connecting members have the same or different curvature; andthe connecting member is elastic in a radial direction so as to befitted on a side wall of an inner cavity of the tree base through thedeformation of the connecting member in the radial direction. Theconnecting member and the frame adjacent thereto are formed as a sideacting member, and the respective side acting members are continuouslyarranged to form a continuous side wall; or the connecting member andthe frame adjacent thereto are formed as a side acting member, a notchis formed between two frames without a connecting member, and the sideacting members and the notches are arranged spacedly to form a side wallformed by spacedly arranged connecting members.

The corresponding arc refers to a virtual arc segment of the outer endsof the any two adjacent frames on the cylindrical surface.

As a fourth aspect of the invention, a fitting device for Christmas treebases is provided to be fitted into a cavity of a Christmas tree base sothat an artificial Christmas tree can be fixed with a base of a realtree. The fitting device has a bottom wall for matching a bottom surfaceof an inner wall of the cavity of the tree base, and a side wall formatching a side surface of the inner wall of the cavity of the treebase. the fitting device further includes frames and connecting members,there are several frames, outer ends of the respective frames aresubstantially on the same cylindrical surface, the connecting member isarranged between outer ends of any two adjacent frames; at least oneconnecting member is arc-shaped and its curvature is greater than thatof a corresponding arc of the cylindrical surface; and the connectingmember is elastic in a radial direction, and the connecting members areformed as the side wall.

The corresponding arc refers to a virtual arc segment of the outer endsof the any two adjacent frames on the cylindrical surface.

When the fitting device of the invention matches a base of aconventional real Christmas tree, an arc-shaped middle section of theconnecting member abuts against the side wall of the inner cavity of thetree base due to greater curvature, a user can apply force to allow thesheet-like connecting member to be deformed in the radial direction, thearc-shaped middle section is deformed inwardly to be fitted into theside wall of the inner cavity of the tree base, and the connectingmember continues to have an outward force to act on the side wall of theinner cavity of the tree base due to its elasticity, so that the fittingmember can be inserted into a tree base with a corresponding size andthen firmly fixed, and therefore does not shake from side to side or isinconvenient to be inserted thereinto. When the fitting device needs tobe removed, it is only necessary to displace the fitting device from thetree base to the opening direction of the inner cavity. At this time,the force of the connecting member acting on the side wall of the treebase only produces frictional force, and the fitting device can beremoved from the inner cavity of the tree base as long as the externalforce is greater than the sum of frictional force and gravity.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic perspective structural view of a fitting device ofa first embodiment of the invention;

FIG. 2 is a top schematic structural view of the embodiment of FIG. 1 ;

FIG. 3 is a schematic perspective structural view (in a bottom view) ofthe embodiment of FIG. 1 ;

FIG. 4 is a cross-sectional view of an A-A section in the embodiment ofFIG. 1 ;

FIG. 5 is a schematic structural view of a connecting member 112 of theembodiment of FIG. 1 ; wherein o1 is a center point of a cylindricalsurface where an outer end of a frame 111 is located, the correspondingarc 110 is an arc with o1 as the center and the distance from the outerend of the frame 111 to o1 as the radius, and o2 is the center of anarc-shaped connecting member 112, so that the curvature of theconnecting member 112 is greater than that of the corresponding arc 110;

FIG. 6 is a partially enlarged schematic view of FIG. 5 ;

FIG. 7 is a schematic structural view of a fitting device of a secondembodiment of the invention; wherein the difference between the fittingdevice in this embodiment and the fitting device in the first embodimentis that side acting members 11 a are discontinuously and spacedlyarranged instead of being continuously arranged;

FIG. 8 is a top schematic structural view of the embodiment of FIG. 7 ;

FIG. 9 a is a schematic view showing the cooperation between the fittingdevice of the embodiment of FIG. 7 and a Christmas tree base, and FIG. 9b is a cross-sectional view of FIG. 9 a ; wherein the tree base has alarger inner cavity size for the fixation of a real tree, the tree baseincludes a barrel 202 which is cylindrical and has a hollow interior toform an inner cavity 204, the barrel 202 is arranged on supporting legs201, threaded fasteners 203 fixed with threads are also arranged at anupper end of an opening of the inner cavity of the barrel 202, and thethreaded fasteners can be rotated to extend into or move out of theinner cavity 204, so as to abut against the bottom of the trunk of aChristmas tree, thus realizing the lateral fixation of the Christmastree;

FIG. 10 is a schematic structural view of a fitting device of a thirdembodiment of the invention, and FIG. 11 is a cross-sectional view of aB-B section in the embodiment of FIG. 10 ; wherein this embodiment isdifferent from the second embodiment in that a tree base hole 13 isarranged off-center instead of being centrally arranged;

FIG. 12 is a schematic structural view of a fitting device of a fourthembodiment of the invention, which is a schematic structural view of afitting device consisting of only side fitting members;

FIG. 13 is a cross-sectional view of a C-C section in the embodiment ofFIG. 12 ;

FIG. 14 is a schematic structural view of the fitting device of thefourth embodiment of the invention;

FIG. 15 is a cross-sectional view of a D-D section in the embodiment ofFIG. 14 ; and

FIG. 16 is a top schematic structural view of a fitting device ofanother embodiment of the invention, which is a schematic structuralview of a fitting device consisting of side fitting members arrangedvertically and horizontally and arranged radially, wherein otherstructures in this embodiment are the same as those in the fourthembodiment.

DETAILED DESCRIPTION OF THE INVENTION

In order that those skilled in the art better understand the inventionto define the claimed scope of the invention more clearly, the inventionwill be described below in detail with reference to some particularembodiments of the invention. It should be noted that the followingdescription only refers to some particular embodiments within theinventive concept, which are only part of the embodiments of theinvention, wherein the detailed direct description of the relatedstructures is only for the convenience of understanding the invention,and various specific features do not certainly and directly define theimplementation range of the invention. Conventional selection andsubstitution made by those skilled in the art under the guidance of theinventive concept shall be considered to be within the claimed scope ofthe invention.

A fitting device for Christmas tree bases is used to be fitted into acavity of a Christmas tree base so that an artificial tree can be fixedwith a base of a real tree, or a real Christmas tree with a smallerbottom trunk size can also be fixed with a base of a conventional realtree.

Embodiment 1

A fitting device for Christmas tree bases is provided. The fittingdevice has a bottom wall 101 for matching a bottom surface of an innerwall of a cavity of a tree base, and a side wall 102 for matching a sidesurface of an inner wall of the cavity of the tree base.

As shown in FIG. 1 , the fitting device 1 consists of a side fittingmember 11 and a bottom fitting member 12, which may be integrallyformed, or separately manufactured so as to form the whole fittingdevice by existing well-known connection methods such as clamping,gluing or screw fixing. An upper end of the side fitting member 11 isformed as an upper end surface 103 of the fitting device, a lower end ofthe side fitting member is integrally formed and connected with an upperend surface of the bottom fitting member 12, and a lower end surface ofthe bottom fitting member 12 is formed as a bottom wall 101 of thefitting device.

Since inner cavities of existing Christmas tree bases are mostlycylindrical, the fitting device also has a similar overall shape, forexample, the fitting device may be cylindrical, or can be adjustedappropriately on this basis to form an alternative shape with a T-shapedsection as shown in FIG. 4 . However, no matter how the shape of thefitting device changes, the fitting device should have a bottom wall 101and a side wall 102, wherein the bottom wall 101 is used for contactinga bottom surface of an inner cavity of a Christmas tree base to providean upward supporting force, the side wall 102 is used for contacting aside surface of the inner cavity of the Christmas tree base to constrainthe fitting device in a lateral direction so as to avoid lateraldisplacement or shaking, so that the Christmas tree arranged in thefitting device is firmly fixed.

Of course, the contact between the fitting device 1 and the bottomsurface or the side surface of the inner cavity of the Christmas treebase is not limited to an area, and can be a complete or near completecontact or a local partial contact to provide support or limit theposition. Obviously, a smaller contact area can reduce the amount ofmaterials used and also facilitate the insertion or removal of thefitting device, but is disadvantageous to the strength of connectionbetween the fitting device and the tree base; on the contrary, a largercontact area can ensure a firm connection therebetween, but has anegative effect on the amount of materials used and the insertion orremoval of the fitting device.

Therefore, the structure and shape of the fitting device can be set asrequired in conjunction with the optimization of material properties andthe design of structural performance, thus achieving a balance betweeneffectiveness and cost in practical applications.

Referring to FIG. 4 , the outer diameter of the bottom fitting member 12is smaller than that of the side fitting member 11, so that a sidesurface of the bottom fitting member 12 is not in contact with that ofthe inner cavity of the Christmas tree base.

Referring to FIG. 3 , the bottom fitting member 12 consists of acylindrical bottom fitting body 121, and a supporting piece 123 arrangedon an outer wall of the bottom fitting body 121. The bottom fitting body121 is cylindrical, the supporting piece 123 extends radially outwardalong an outer surface of the bottom fitting body 121 to form severalsupporting pieces 123 arranged radially; and a bottom surface of thesupporting piece 123 is flush with that of the bottom fitting body 121,and the two bottom surfaces together form the bottom wall 101 of thefitting device.

Of course, it is also feasible that the bottom surfaces of the bottomfitting body 121 and the supporting piece 123 are not on the same plane,so that the bottom wall 101 is formed of only the bottom surface of oneof the bottom fitting body 121 and the supporting piece 123; oralternatively, it is also possible that a separate leg extendingdownward is arranged on at least one of the two bottom surfaces to serveas a supporting bottom wall 101.

Referring to FIGS. 3 and 4 , the bottom fitting body 121 is hollow toform a hollow central cavity 122 for matching a convex post located atthe center of the inner cavity of the Christmas tree base, so that thebottom wall 101 of the bottom fitting body 121 can contact the bottomsurface of the inner cavity of the tree base.

Referring to FIG. 1 , the side fitting member 11 of the fitting deviceis in a flat cylindrical shape as a whole and arranged concentricallywith the bottom fitting member 12; and a tree base hole 13 located atthe center of the side fitting member 11 for insertion of a small-sizedtree base is formed of the bottom fitting body 121 of the bottom fittingmember 12 extending upward.

Referring to FIG. 4 , the tree base hole 13 includes an upper hole 131,a transition hole 132 and a bottom hole 133, wherein the cross-sectionalshape of the upper hole 131, the transition hole 132 and the bottom hole133 is preferably a circle, but it is also possible that otherconventional shapes such as a rectangle and an ellipse are used instead;and taking a circular cross-section as an example, the inner diameter ofthe upper hole 131 is greater than that of the bottom hole 133, and thetransition hole 132 is arranged between the upper hole 131 and thebottom hole 133 to smoothly connect an inner wall of the upper hole 131with a larger inner diameter and an inner wall of the bottom hole 133,i.e. the inner diameter of the transition hole 132 decreases as a wholefrom top to bottom. Most preferably, as shown in FIG. 4 , an inner wallof the transition hole 132 is conical.

Moreover, the bottom hole 133 is communicated with the central cavity122 of the bottom fitting body 121, so that the upper hole 131, thetransition hole 132, the bottom hole 133 and the central cavity 122 forma through hole that penetrates vertically.

Referring to FIG. 4 , when the height of the side fitting member 11 issmall, the structure of the tree base hole 13 may not be accommodated bythe side fitting member 11, so a part of the structure of the tree basehole 13 can be arranged in the bottom fitting member 12. The overallheight of the fitting device is the sum of the height of the sidefitting member 11 and the height of the bottom fitting member 12, andthis size can be specifically set as required; the width of the fittingdevice 1 is the diameter of the side fitting member 11 in most cases,this size can also be specifically set as required Of course,considering that traditional Christmas tree bases also have differentsizes, the height and diameter of the fitting device 1 can be setaccordingly so that the fitting device can be fully or partiallyinserted into the inner cavity of the Christmas tree base.

In order that the fitting device 1 can have a good matching effect onthe inner cavity of the Christmas tree base, the fitting device 1 ispreferably completely accommodated in the inner cavity of the Christmastree base, whether the upper end surface 103 of the fitting device 1 isflush with or lower than an upper surface of the inner cavity of theChristmas tree base is not limited.

In this case, it is necessary to consider the matching effect of theside wall 102 of the fitting device 1 on the inner cavity of theChristmas tree base. Although the outer diameter of the side wall 102 ofthe fitting device 1 is most preferably equal to the inner diameter ofthe inner cavity of the Christmas tree base, it is not favorable tomachining and manufacturing, because it is difficult to achieve the samemachining accuracy due to the use of the two parts on differentequipment. In addition, Christmas tree bases may be existing and complywith general standards, but traditional Christmas tree bases do notrequire high precision on the inner cavity due to fixing by bolts, whilethe fitting device needs to be fitted to traditional tree bases, so thefitting precision needs to be considered.

For this reason, the side fitting member 11 of the fitting device 1 isarranged to consist of frames 111 and connecting members 112.

Referring to FIG. 1 , the frames 111 are arranged to extend outward in aradial direction from an outer surface of the tree base hole 13 to forma frame group with a radial shape; the length of the respective frames111 is approximately the same, so that outer ends of the respectiveframes 111 are on the same cylindrical surface; and the connectingmember 112 is arc-shaped and arranged between outer ends of two adjacentframes 111 to connect the outer ends of the two frames 111. Moreover, inthe fitting device 1, the respective connecting members 112 arecontinuously arranged; i.e. a connecting member 112 is respectivelyarranged between outer ends of each frame 111 and another adjacent frame111 on a left or right side thereof to form a side fitting member 11with a complete side surface. Any one connecting member 112 and theframe 111 adjacent thereto are formed as a side acting member 11 a, andrespective side acting members 11 a are continuously arranged to form aside wall 102.

Inner ends of the frames 111 and the tree base hole 13 as well as theconnecting members 112 and the outer ends of the respective frames 111may be integrally formed, or separately manufactured and then assembledtogether by known connection and fixing methods such as clamping,gluing, heat fusion or screw fixing to form the side fitting member 11.

Referring to FIG. 5 , the connecting member 112 is arc-shaped and itscurvature is greater than that of a corresponding arc 110 between theouter ends of the adjacent frames 111, so that the connecting member 112is more protruding than a virtual arc segment of the outer ends of theadjacent frames 111 on the cylindrical surface; and the connectingmember 112 is elastic in a radial direction, so as to be deformed andgenerate an opposite force under the action of an external force.

For example, the connecting member 112 has a larger size in the heightdirection (i.e. the vertical direction shown in FIG. 4 ) to form alarger height, but has a smaller size in the radial direction (i.e. thehorizontal direction shown in FIG. 4 ) to form a smaller thickness, andfinally a sheet-like connecting member 112 is formed (referring to FIGS.1 and 3 ).

Moreover, the diameter of the side fitting member 11 at the frames 111is set to be slightly smaller than the inner diameter of the innercavity of the corresponding Christmas tree base, and the diameter of theside fitting member 11 at the connecting members 112 is set to beslightly greater than the inner diameter of the inner cavity of theChristmas tree base. When the fitting device matches the Christmas treebase, an arc-shaped middle section of the connecting member 112 abutsagainst the side wall of the inner cavity of the tree base due togreater curvature, a user can apply force to allow the sheet-likeconnecting member 112 to be deformed in the radial direction, thearc-shaped middle section is deformed inwardly to be fitted into theside wall of the inner cavity of the tree base, and the connectingmember 112 continues to have an outward force to act on the side wall ofthe inner cavity of the tree base due to its elasticity, so that thefitting member 11 can be inserted into a tree base with a correspondingsize and then firmly fixed, and therefore does not shake from side toside or is inconvenient to be inserted thereinto.

Of course, when the fitting device 1 needs to be removed, it is onlynecessary to displace the fitting device from the tree base to theopening direction of the inner cavity. At this time, the force of theconnecting member 112 acting on the side wall of the tree base onlyproduces frictional force, and the fitting device 1 can be removed fromthe inner cavity of the tree base as long as the external force isgreater than the sum of frictional force and gravity.

Embodiment 2

Referring to FIGS. 7 and 8 , a fitting device for Christmas tree basesis provided, the main structure of which is the same as that of thefitting device 1 of Embodiment 1, which will not be repeatedly describedherein.

The only difference is that, in this embodiment, the connecting members112 of the fitting device are spacedly arranged; i.e. for any frame 111,a connecting member 112 is arranged between outer ends of the frame andanother adjacent frame 111 on a left or right side thereof, therebyforming a fitting device 1 with spacedly arranged connecting members112. In the fitting device 1, side surfaces of the side fitting member11 are not complete and continuous, but spacedly arranged. The adjacentframes 111 and the connecting member 112 arranged therebetween areformed as a side acting member 11 a, and a notch 11 b is formed betweentwo frames without a connecting member 112.

Obviously, the sum of the number of the side acting members 11 a and thenotches 11 b is equal to the number of the frames 111, but the number ofthe side acting members 11 a is not necessarily equal to that of thenotches 11 b; and when there are an odd number of the frames 111, thenumber of the side acting members 11 a is not equal to that of thenotches 11 b. However, in terms of practical applications, three shouldbe at least three side acting members 11 a, so that after the fittingdevice 1 is inserted into the tree base, the fitting device 1 can form afirm lateral support effect with the side wall of the inner cavity ofthe tree base.

Schematic perspective and sectional structural views of the fittingdevice used in cooperation with the tree base are shown in FIGS. 9 a and9 b , respectively.

Although, in this embodiment, the side acting members 11 a and thenotches 11 b are sequentially arranged to form a spaced arrangement, itis not necessary. In the fitting device of the invention, the notch 11 bcan also be used to replace any one of the side acting members 11 a soas to form a fitting device in which respective side acting members 11 aare discontinuously arranged.

Embodiment 3

A fitting device for Christmas tree bases is provided, the mainstructure of which is the same as that of the fitting device 1 ofEmbodiment 1 or 2, which will not be repeatedly described herein. Theonly difference is that the tree base hole 13 is not arranged at thecenter, i.e. the tree base hole 13 is eccentrically arranged.

Embodiment 4

Referring to FIGS. 13 to 15 , a fitting device for Christmas tree basesis provided, the main structure of which is the same as that of thefitting device 1 of Embodiment 1 or 2, which will not be repeatedlydescribed herein. The only difference is that the frames 111 arearranged in a crisscross pattern instead of being arranged radially in aradial direction.

Of course, in this embodiment, the tree base hole 13 may also not bearranged at the center.

Example 5

Referring to FIG. 16 , a fitting device for Christmas tree bases isprovided, the main structure of which is the same as that of the fittingdevice 1 of Embodiment 1 or 2, which will not be repeatedly describedherein. The only difference is that, the side fitting members 11 includeframes 111 and connecting members 112, the frames 111 include innerframes and outer frames, the inner frames are arranged in a crisscrosspattern to form a mesh structure, a connecting frame is connected to anouter end of at least one inner frame, and the outer frames are arrangedto extend outward in a radial direction from an outer surface of theconnecting frame to form an outer frame group with a radial shape; andthe length of the respective outer frames is approximately equal, sothat outer ends of the respective outer frames are approximately on thesame cylindrical surface.

What is claimed is:
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 18. Afitting device for Christmas tree base, which is used for fitting into acavity of a real Christmas tree base to make an artificial Christmastree be fixed with the real Christmas tree base; comprising: a sidefitting member, an upper surface of which is formed as an upper surfaceof the fitting device, a bottom fitting member connected to the sidefitting member, a lower surface of the bottom fitting member is formedas a bottom wall of the fitting device, and a tree base hole formed inthe upper surface of the fitting device, the tree base hole which has asmall-sized tree base is used for fitting the artificial Christmas tree;the side fitting member including: frames, arranged to extend outward ina radial direction from outer surface of the tree base hole to form aradial-shaped frame group; the length of each respective frame isapproximately equal, so that outer ends of each respective frame isapproximately on a cylindrical surface; and connecting members, arrangedbetween the outer ends of adjacent frames, the connecting members areelastic in the radial direction so as to be fitted on a side wall of thecavity of the real Christmas tree base through deformation of theconnecting members in the radial direction; and the connecting membersare formed as a side wall of the fitting device; at least one of theconnecting members is arc-shaped and curvature of the connecting membersis greater than curvature of the cylindrical surface.
 19. The fittingdevice for Christmas tree base according to claim 18, wherein each ofthe connecting members is arranged between outer end of each respectiveframe and another frame adjacent on both of left and right sidesthereof, and the respective connecting members have same or differentcurvature; and a side acting member is formed by each of the connectingmembers and respective frame adjacent to it, and all of the side actingmember is arranged continuously.
 20. The fitting device for Christmastree base according to claim 18, wherein each of the connecting membersis arranged between outer end of each respective frame and another frameadjacent on either of left or right side thereof, and the respectiveconnecting members have same or different curvature; and a side actingmember is formed by each of the connecting members and respective frameadjacent thereto, a notch is formed between the adjacent frames withoutrespective connecting member, and the side acting member and the notchis arranged spacedly.
 21. The fitting device for Christmas tree baseaccording to claim 18, wherein the bottom fitting member including: abottom fitting body, which is cylindrical, and a supporting piecearranged on an outer wall of the bottom fitting body, the supportingpiece extends radially outward along an outer surface of the bottomfitting body; and a bottom wall of the fitting device is formed by abottom surface of the supporting piece or a bottom surface of the bottomfitting body.
 22. The fitting device for Christmas tree base accordingto claim 21, wherein outer diameter of the bottom fitting member issmaller than outer diameter of the side fitting member, a side surfaceof the bottom fitting member do not contacting with the cavity of thereal Christmas tree base.
 23. The fitting device for Christmas tree baseaccording to claim 21, wherein a hollow central cavity which isinternally is formed in the bottom fitting body, and the side fittingmember is formed as a flat cylindrical shape and arranged concentricallywith the bottom fitting member; and the tree base hole is formed byextending the bottom fitting body upward; and the tree base holeincluding an upper hole, a transition hole and a bottom hole in acircular cross-sectional shape, inner diameter of the upper hole isgreater than inner diameter of the bottom hole, and an inner wall of thetransition hole is conical to smoothly connect an inner wall of theupper hole and an inner wall of the bottom hole; and the bottom hole iscommunicated with the central cavity.
 24. The fitting device forChristmas tree base according to claim 18, wherein the connectingmembers are sheet-like; and diameter of the cylindrical surface isslightly smaller than inner diameter of the cavity of the real Christmastree base.
 25. The fitting device for Christmas tree base according toclaim 20, wherein quantity of the side acting members is at least three,and quantity of the side acting member and the notch is same ordifferent.
 26. A fitting device for Christmas tree base, which is usedfor fitting into a cavity of a real Christmas tree base to make anartificial Christmas tree be fixed with the real Christmas tree base;comprising: a side fitting member, an upper surface of which is formedas an upper surface of the fitting device, a bottom fitting memberconnected to the side fitting member, a lower surface of the bottomfitting member is formed as a bottom wall of the fitting device, and atree base hole formed in the upper surface of the fitting device, thetree base hole which has a small-sized tree base is used for fitting theartificial Christmas tree; the side fitting member including: frames,arranged in a crisscross pattern to form a mesh structure, and lengthsof the frames are set according to position of respective frames so thatouter end of respective frames are substantially on a cylindricalsurface; and connecting members, arranged between outer end ofrespective frames adjacently to connect outer end of the frame; at leastone connecting member is arc-shaped and its curvature is greater thancurvature of the cylindrical surface, and respective connecting memberhave same or different curvature; and the connecting members are elasticin a radial direction so as to be fitted on a side wall of the cavity ofthe real Christmas tree base through deformation of the connectingmember in the radial direction; and a side acting member is formed bythe connecting member and respective frame adjacently thereto, and allof the side acting member is arranged continuously; or a side actingmember is formed by each of the connecting member and respective frameadjacently thereto, a notch is formed between respective frameadjacently without the connecting member, the side acting member and thenotche is arranged spacedly.
 27. A fitting device for Christmas treebase, which is used to be fitting into a cavity of a real Christmas treebase to make an artificial Christmas tree can be fixed with the realChristmas tree base; comprising: a side fitting member, an upper surfaceof which is formed as an upper surface of the fitting device, a bottomfitting member connected to the side fitting member, a lower surface ofthe bottom fitting member is formed as a bottom wall of the fittingdevice, and a tree base hole formed in the upper surface of the fittingdevice, the tree base hole which has a small-sized tree base is used forfitting an artificial Christmas tree; the side fitting member including:frames, including inner frames and outer frames, the inner frames arearranged in a crisscross pattern to form a mesh structure, a connectingframe is connected to an outer end of at least one respective innerframe, and the outer frames are arranged to extend outward in a radialdirection from an outer surface of the connecting frame to form a framegroup with a radial shape; and length of respective outer frames isapproximately equal, so that outer end of respective outer frames aresubstantially on a cylindrical surface; the connecting member isarc-shaped and arranged between outer ends of two adjacent respectiveouter frames to connect the outer ends of the two respective outerframes; and respective connecting members have same or differentcurvature; and the connecting member is elastic in a radial direction soas to be fitted on a side wall of the cavity of the real Christmas treebase through a deformation of the connecting member in the radialdirection; and a side acting member is formed by each of the connectingmembers and respective frame adjacently thereto, and all of therespective side acting member is arranged continuously; or a side actingmember is formed by each of the connecting members and respective frameadjacently thereto, a notch is formed between the frame adjacentlywithout respective connecting member, the side acting member and thenotche is arranged spacedly.
 28. The fitting device for Christmas treebase according to claim 27, wherein quantity of the side acting membersis at least three.
 29. A fitting device for Christmas tree base, whichis used for fitting into a cavity of a real Christmas tree base to makean artificial Christmas tree can be fixed with the real Christmas treebase; comprising: a bottom wall of the fitting device for matching abottom surface of the cavity of the real Christmas tree base, a sidewall of the fitting device for matching a side surface of the cavity ofthe real Christmas tree base; frames, outer end of which issubstantially on a cylindrical surface, and each of the connectingmembers arranged between outer end of respective adjacent frames; atleast one connecting member is arc-shaped and its curvature is greaterthan curvature of the cylindrical surface; the connecting members areelastic in a radial direction, all of the connecting members are formedas the side wall of the fitting device.
 30. The fitting device forChristmas tree base according to claim 29, wherein the fitting devicefurther including a side fitting member, the frames and the connectingmembers are arranged on the side fitting member, the respective frame isarranged to extend outward in the radial direction, and length of therespective frame is approximately equal.
 31. The fitting device forChristmas tree base according to claim 29, wherein the fitting devicefurther including a side fitting member, the frames and the connectingmembers are arranged on the side fitting member, the respective frame isarranged in a crisscross pattern to form an intersecting mesh structure,and length of the frames is set according to position of the respectiveframe so that the outer ends of the respective frames are substantiallyon a cylindrical surface.
 32. The fitting device for Christmas tree baseaccording to claim 29, wherein the fitting device further including aside fitting member, and the frames and the connecting members arearranged on the side fitting member; the frames including inner frameand outer frame, the inner frame is arranged in a crisscross pattern toform a mesh structure, a connecting frame is connected to an outer endof at least one respective inner frame, and the outer frame is arrangedto extend outward in the radial direction from an outer surface ofrespective connecting frame to form a frame group with a radial shape;and length of the respective outer frame is approximately equal, so thatouter end of the respective outer frame is substantially on acylindrical surface.
 33. The fitting device for Christmas tree baseaccording to claim 29, wherein the fitting device further including abottom fitting member, an upper surface of the fitting device is formedby a surface of the side fitting member and the other surface of theside fitting member is connected to or integrally formed with onesurface of the bottom fitting member, and the bottom wall of the fittingdevice is formed by the other surface of the bottom fitting member. 34.The fitting device for Christmas tree base according to claim 30 whereina side acting member is formed by respective connecting member andrespective frame adjacent thereto, and all of the side acting member iscontinuously arranged; or, a side acting member is formed by each of theconnecting member and respective frame adjacent thereto, a notch isformed between respective frames adjacent without respective connectingmember, the side acting member and the notch is arranged spacedly.